It's large: it would be perfect as floor cushion (but I would scotch guarded in that case).

here's the result: a 6 meters (about 20 ft long) knitted tube

Edit 2/8/2015 : I'm taking down my tutorial after being asked by Ragnheidur Osp (the designer also known as Umemi on Etsy)

Edit: 3/1/2014Have you noticed how many times I mentioned "time consuming" in this DIY? From beginning to end, I worked about two days on it.Not to mention that if you want a quality product, you'll end up spending quite some money on the yarn and filling.This is where I wished I've found the Umemi Etsy store sooner...